국내산 녹두전분과 도토리전분을 이용하여 초산 녹두 및 초산 도토리전분을 제조하고, 이화학적 특성 및 겔의 조직감을 비교하였다. 무수 초산 6%를 반응시켜 제조한 초산 녹두와 초산 도토리전분의 %acetyl 함량은 1.88%과 1.53% 였고, 치환도는 0.07과 0.06이었다. 전분의 색도를 측정한 결과, L값과 a값은 증가하였고, b값은 감소하여 초산 처리가 전분의 색에도 영향을 주었음을 알 수 있었다. 또한 초 산전분은 전분 chain 내부에 초산기가 도입되어 원료 전분 에 비해 blue value, 팽윤력 및 용해도가 증가하는 것을 알 수 있었다. 신속호화점도계(RVA)를 이용하여 측정한 호화 특성은 녹두전분과 도토리전분의 호화온도가 각각 70.4oC, 75.7oC로 나타났고, 초산 녹두 및 초산 도토리전분은 각각64.4oC, 74.8oC로 나타나 초산 처리 시 호화온도가 감소하는 것을 알 수 있었으나, 도토리전분의 경우 초산 도토리 전분과의 유의적인 차이는 나타나지 않았다. 초산전분은 원료 전분과 최고점도, setback, breakdown에도 차이를 보였는데, 초산 녹두전분은 최고점도 164.9 RVU, setback 70.9 및 breakdown 53.4로 녹두전분의 최고점도 195.0 RVU, setback 110.6 및 breakdown 69.0에 비해 감소하였고, 초산 도토리전분은 최고점도 212.1 RVU, setback 128.7, 및 breakdown 50.3으로 도토리전분의 최고점도 198.3 RVU, setback 87.0 및 breakdown 38.2보다 증가하는 특성을 나타내었다. 초산전분으로 겔을 제조하여 조직감을 측정한 결과 초산 녹두전분은 겔을 형성하지 못하였고, 초산 도토리전분은 원료 전분 겔에 비해 경도와 탄성이 감소하였으며, 응집성, 검성, 씹힘성이 증가하여 겔이 무른 특성을 나타내었다.

A fabrication method to improve the processability of thermoplastic carbon nanotube (CNT) mat composites was investigated by using in-situ polymerizable and low viscous cyclic butylene terephthalate oligomers. The electrical conductivity of the CNT mat composites strongly depended on the compression pressure, and the trend can be explained in terms of two cases, low and high compression pressure, respectively. High CNT mat content in the CNT mat composites and the surface of the CNT mat composites with fully contacted CNTs was achieved under high compression pressure, and direct contact between four probes and the surface of the CNT mat composites with fully contacted CNTs gave resistance of 2.1Ω. In this study the maximum electrical conductivity of the CNT mat composites, obtained under a maximum applied compression pressure of 27 MPa, was 11 904 S m-1, where the weight fraction of the CNT mat was 36.5%.

‘Haeoreum’, a new variety of Hibiscus syriacus was selected from the progenies of artificial breeding between ‘Bulkot’, as a mother plant, and ‘Wonhwa’, as a pollenizer, at the Korea Forest Research Institute in 2006. The preliminary, advanced and regional trials for evaluation and selection of this variety were carried out from 2012 to 2013. Investigated morphological characteristics showed that ‘Haeoreum’ is a simple flower type and has bell shape in open type of corolla. The diameter of flower is about 12.8mm, and the white petals are slightly folded each other. The length of red eye zone is very long, about 26.0mm. Leaf type is in oval shape, and leaf thickness, glossy level and the shape of leaf base is medium, medium and rounded, respectively. Its blooming period each year lasted more than 80 days, and the quantity of bloom is large in normal condition. In addition, it showed faster growth performance compared to the similar varieties, about 90cm per growing season in tree height. According to all these characteristics, the new variety ‘Haeoreum’ could be useful for large container plants or street trees.

‘Jowon’ is a new early-maturing potato variety for table use. It has spreading growth habit with narrow oval leaves. Its tubers are attractively round with white skin and light yellow flesh color. The yielding ability of Jowon is similar to Superior. Jowo